Document
Ordering number:EN4857
NPN Epitaxial Planar Silicon Transistor
2SC4871
UHF to S Band Low-Noise Amplifier, OSC Applications
Features
· High cutoff frequency : fT=10GHz typ. · High gain : S21e2=13dB typ (f=1GHz). · Low noise : NF=1.3dB typ (f=1GHz).
· Small Cob : Cob=0.4pF typ.
0.425
Package Dimensions
unit:mm 2059B
[2SC4871]
0.3
3
0.15
0.2
0 to 0.1
2.1 1.250
0.425
12 0.65 0.65
2.0
Specifications
Absolute Maximum Ratings at Ta = 25˚C
Parameter
Symbol
Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Dissipation Junction Temperature Storage Temperature
VCBO VCEO VEBO
IC PC Tj
Tstg
Electrical Characteristics at Ta = 25˚C
Conditions
Parameter
Symbol
Conditions
Collector Cutoff Current Emitter Cutoff Current DC Current Gain Gain-Bandwidth Product Output Capacitance Forward Transfer Gain Noise Figure
ICBO IEBO hFE
fT Cob | S21e |2
NF
VCB=10V, IE=0 VEB=1V, IC=0 VCE=5V, IC=4mA VCE=5V, IC=4mA VCB=10V, f=1MHz VCE=5V, IC=7mA, f=1GHz VCE=5V, IC=4mA, f=1GHz
* : The 2SC4871 is classified by 4mA hFE as follows : Marking : HN
hFE rank : 3, 4, 5
60 3 120
90 4 180 135 5 270
0.3 0.6 0.9
1 : Base 2 : Emitter 3 : Collector SANYO : MCP
Ratings 16 8 1.5 20
100 150 –55 to +150
Unit V V V mA
mW ˚C ˚C
Ratings min typ
60* 10 0.4
10 13 1.3
max 1.0 10
270*
0.7
2.8
Unit
µA µA
GHz pF dB dB
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12599HA (KT)/41095TS (KOTO) TA-0078 No.4857–1/4
2SC4871
No.4857–2/4
S parameter
2SC4871
No.4857–3/4
S parameter (Common emitter)
VCE=5V, IC=2mA, ZO=50Ω
Freq (MHz) 200
| S11 | 0.912
∠ S11 –17.6
400
0.835
–33.0
600
0.742
–46.9
800
0.649
–58.9
1000
0.578
–68.7
1200
0.512
–78.1
1400
0.445
–86.3
1600
0.400
–93.0
1800
0.359
–98.5
2000
0.319
–106.6
VCE=5V, IC=7mA, ZO=50Ω
Freq (MHz)
| S11 |
200 0.721
400 0.555
600 0.428
800 0.344
1000
0.291
1200
0.254
1400
0.221
1600
0.197
1800
0.178
2000
0.171
∠ S11 –35.1 –59.9 –77.5 –89.9 –100.6 –110.9 –121.4 –128.9 –136.7 –148.6
2SC4871
| S21 | 5.764 5.282 4.753 4.268 3.840 3.440 3.123 2.836 2.588 2.397
∠ S21 161.5 145.5 131.2 119.4 109.4 100.5 92.5 85.2 79.0 73.0
| S12 | 0.034 0.065 0.088 0.107 0.121 0.134 0.145 0.154 0.164 0.174
| S21 | 12.262 9.445 7.290 5.877 4.911 4.223 3.703 3.294 3.946 2.692
∠ S21 147.1 124.9 110.2 100.1 92.1 85.1 79.0 73.6 68.5 63.8
| S12 | 0.030 0.050 0.065 0.078 0.091 0.104 0.117 0.129 0.143 0.157
∠ S12 79.0 69.9 62.8 57.9 54.5 52.2 50.3 49.2 48.4 47.9
∠ S12 72.8 64.4 61.9 61.5 61.7 61.5 61.6 61.6 61.1 60.7
| S22 | 0.974 0.919 0.850 0.789 0.740 0.698 0.664 0.638 0.615 0.601
| S22 | 0.900 0.763 0.666 0.611 0.583 0.563 0.551 0.540 0.530 0.529
∠ S22 –10.3 –19.2 –26.3 –31.6 –35.5 –38.9 –41.6 –44.3 –46.3 –48.3
∠ S22 –16.9 –25.6 –29.3 –31.1 –32.5 –34.1 –35.7 –37.8 –39.7 –41.7
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local.